21-binary_search_tree_2

21-binary_search_tree_2 - CSE143 Lecture21...

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CSE 143 Lecture 21 Binary Search Trees, continued  read 17.3 slides created by Marty Stepp http://www.cs.washington.edu/143/
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2 Binary search trees binary search tree  ("BST"): a binary tree that is either: empty ( null ), or a root node R such that: every element of R's left subtree contains data "less than" R's data, every element of R's right subtree contains data "greater than" R's, R's left and right subtrees are also binary search trees. BSTs store their elements in sorted order, which is helpful for searching/sorting tasks. 91 60 87 29 55 42 -3 overall root
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3 Exercise Add a method  add  to the  IntTree  class that adds a given  integer value to the tree.  Assume that the elements of the  IntTree  constitute a legal binary search tree, and add the  new value in the appropriate place to maintain ordering. tree.add(49) ; 91 60 87 29 55 42 -3 overall root 49
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4 The incorrect solution public class SearchTree { private IntTreeNode overallRoot; // Adds the given value to this BST in sorted order. // (THIS CODE DOES NOT WORK PROPERLY!)
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This note was uploaded on 01/04/2011 for the course CSE 143 taught by Professor Sr during the Spring '08 term at University of Washington.

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21-binary_search_tree_2 - CSE143 Lecture21...

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